Many people have done some L1 board's, but isn't there any custom made board for the QFN or BGA IC's yet ??In general people seems to want's USB2.0 connection /Ethernet, SDRAM connection, and I/O to some device.

Today I published our first library, containing two XMOS XS1-L1 variants (64,128). Look at the project for a link to the github repo.

I also have a second repo that has a general set of components I'm using, and also a library called xmossupport, which contains parts found on some of the XMOS reference designs. https://github.com/topiaruss/KiCad-Parts